rootVolume

Specifies whether the configuration is for the cluster's root or secondary Amazon EBS volume. You can specify two ClusterEbsVolumeConfig fields to configure both the root and secondary volumes. Set the value to True if you'd like to provide your own customer managed Amazon Web Services KMS key to encrypt the root volume. When True:

• The configuration is applied to the root volume.

• You can't specify the VolumeSizeInGB field. The size of the root volume is determined for you.

• You must specify a KMS key ID for VolumeKmsKeyId to encrypt the root volume with your own KMS key instead of an Amazon Web Services owned KMS key.

Otherwise, by default, the value is False, and the following applies:

• The configuration is applied to the secondary volume, while the root volume is encrypted with an Amazon Web Services owned key.

• You must specify the VolumeSizeInGB field.

• You can optionally specify the VolumeKmsKeyId to encrypt the secondary volume with your own KMS key instead of an Amazon Web Services owned KMS key.